SR4315 over US421
FairForsyth County, North Carolina · 0.8 Mi. S. Jct. SR2643 · Structure no. 000000000670167
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 271 ft
- 4 main spans
- Daily traffic
- 31,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
SR4315 over US421 is a steel stringer/multi-beam or girder carrying SR4315 over US421 in Forsyth County, North Carolina. It was built in 1992, so it is 33 years old, younger than the North Carolina average of 38.7 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 31,000 vehicles a day, roughly 6% of them trucks, projected to reach 62,000 by 2040. The structure is 271 ft (82.6 m) long and 82 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR4315 over US421 built?
It was built in 1992, making it 33 years old in 2025.
What condition is SR4315 over US421 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.
How much traffic does SR4315 over US421 carry?
About 31,000 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is SR4315 over US421?
The structure is 271 ft (82.6 m) long with a longest span of 96 ft (29.2 m) and a deck 82 ft wide.
Who owns SR4315 over US421?
It is owned by the State Highway Agency.